the nature of the metal and the bb like pieces and the nails and questions whether this came from the environment, right? but it is not. >> i can tell you, as a person who has done trauma surgery, it can be difficult to tell sometimes when you're actually taking some of the shrapnel, wear exactly did it come from. but now they're saying without a doubt, we asked a few times, that there were nails, carpenter nails specifically and, quote, bb-like metal within some of these patients. and so they -- they know for sure it came from the explosive device. this is a doctor saying that based on their medical examination. this wasn't just debris that was lying around. >> what about also quickly in terms of the amputations, i was hearing one of the doctors saying last night, some of the patients were coming to them very injured, bleeding and saying, take whatever you need, i want to be alive. that has to be tough for a doctor, though. >> these are i think heart breaking decisions. it is a -- you can make the decision fairly quickly if that's going to be the best course of action. >> life or death. >> if yo